srclist overlap message for exposure 3 of trigger 1035922
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d16h49m55s044410usUT
The observation of trigger 1035922 started 2021-03-05T19:18:07.0
Examining file ./1035922_g902_uvot_sky_srclist.fits
The exposure ID is 636664687
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (319.8134,34.5508) with a roll angle of 142.6
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (319.8079,34.5480) with a radius of 1.000 arc min
This is 0.318 arc min from the center of the uvot region
The area of the BAT error circle is 3.14 sq. arc min
The UVOT/BAT overlap is 3.14 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (319.8105,34.5540) with a radius of 0.023 arc min
This is 0.238 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1035922
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d16h50m11s378615usUT
Observation start time is 2021-03-05T19:18:07.0
Examining file ./1035922_g902_uvot_catalog_srclist.fits
The exposure ID is 636664687
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1035922_g902
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1035922_g902 has mag 18.48
Aspect correction adds 0.00059 degrees (0.141 sec of time = 1.74 arc sec) to RA
Aspect correction adds -0.00038 degrees (-1.35 arcsec) to Dec
Total aspect correction is 2.21 arcsec
Star catalogs centered at 319.8231 , 34.5524 with radius 8.41 arc min.
n_usno: 2726 n_gsc: 0
*** WARNING -- bright star catalog has 16 entries brighter than 12 mag
The brightest has mag 10.2366
RA DEC Mag Color
bright star 0: 319.84949 (21:19:23.88) 34.57085 (+34:34:15.1) 11.36 USNO-V
bright star 1: 319.84167 (21:19:22.00) 34.60766 (+34:36:27.6) 10.80 USNO-V
bright star 2: 319.75502 (21:19:01.20) 34.53556 (+34:32:08.0) 11.53 USNO-V
bright star 3: 319.89382 (21:19:34.52) 34.57376 (+34:34:25.6) 11.69 USNO-V
bright star 4: 319.85625 (21:19:25.50) 34.47992 (+34:28:47.7) 11.46 USNO-V
bright star 5: 319.69834 (21:18:47.60) 34.58291 (+34:34:58.5) 10.24 USNO-V
bright star 6: 319.95513 (21:19:49.23) 34.58373 (+34:35:01.4) 11.87 USNO-V
bright star 7: 319.95504 (21:19:49.21) 34.50186 (+34:30:06.7) 11.90 USNO-V
bright star 8: 319.70073 (21:18:48.18) 34.47532 (+34:28:31.2) 10.37 USNO-V
bright star 9: 319.93422 (21:19:44.21) 34.46111 (+34:27:40.0) 11.76 USNO-V
bright star 10: 319.73566 (21:18:56.56) 34.44489 (+34:26:41.6) 11.39 USNO-V
bright star 11: 319.66873 (21:18:40.49) 34.52328 (+34:31:23.8) 11.55 USNO-V
bright star 12: 319.97659 (21:19:54.38) 34.58995 (+34:35:23.8) 11.51 USNO-V
bright star 13: 319.98175 (21:19:55.62) 34.58336 (+34:35:00.1) 11.77 USNO-V
bright star 14: 319.79805 (21:19:11.53) 34.41452 (+34:24:52.3) 11.50 USNO-V
bright star 15: 319.92811 (21:19:42.75) 34.66207 (+34:39:43.4) 11.46 USNO-V
Mean distance difference (CAT_DELTA) for 186 matched entries is 0.689" for 1035922_g902
Mean and std. dev of mag. difference (MAG_DELTA) are 1.654 and 0.482 for 1035922_g902
Found 8 entries without IDs and 1 entries that are acceptable afterglow candidates for 1035922_g902.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=319.8079 (21:19:13.90) DEC=34.5480 (+34:32:52.8)
XRT distances are from RA=319.8105 (21:19:14.53) DEC=34.5540 (+34:33:14.5)
-----------------
Entry 19 in the list of sources is a candidate afterglow for 1035922_g902 with 3x3 stamp
ra=319.81402 (21:19:15.37) dec=34.52468 (+34:31:28.9) +/- 1.1" mag=13.86+/-0.35
dist=106.1 REFID=3
*** The position of this source is inconsistent with the XRT position.
The position is 116.3 arc sec from the BAT position.
src: 19 distr. of nearby unmatched sources: 1 0 0 0 0
Found 6 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
319.8121 34.5289 16.1 -1 USNO-B1 99.99 19.33 99.99
319.8145 34.5276 10.8 -1 USNO-B1 20.20 99.99 99.99
319.8203 34.5254 18.8 -1 USNO-B1 19.87 18.77 19.26
319.8145 34.5243 2.0 -1 USNO-B1 12.99 12.43 12.68 *
319.8189 34.5220 17.4 -1 USNO-B1 19.50 17.80 18.55
319.8141 34.5212 12.6 -1 USNO-B1 16.62 15.92 16.23
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 2 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
319.8106 34.5567 9.7 -1 USNO-B1 17.03 15.43 16.14
319.8097 34.5554 5.5 -1 USNO-B1 15.34 14.16 14.68
The closest star is 5.53" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=319.80948 (21:19:14.27) dec=34.55512 (+34:33:18.4) +/- 1.1" mag=16.53+/-0.35 dist=5.0 REFID=50
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 1035922
SRCLIST PROBLEM: srclist filled telemetry buffer
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB210305 (Swift/BAT trigger 1035922) at 19:03:04 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 875 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.155.
------- notes for trigger 1035922 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d16h50m15s594189usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1035922
-expid=636664687 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1035922/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 636664687.0003 or about 2021:064:19:18:02 UT
Found 2722 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 26% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 8 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 28 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 0 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.24 mag. Found 251 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 26% of the Genie image region.
Genie image analysis:
Found 120723.7 counts in the large background region of 5586.0 pixels or a rate
of 21.612 counts/pixel in a radius of 45.0 arcsec. Based on this background,
the typical 5-sigma UL at a random point in the Genie image is 19.50 mag. for a
4-arcsec aperture.
Found 8803.2 counts in the XRT position region of 198.0 pixels or a rate of
44.461 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 30.400 +/- 0.652 (1-sigma) cps or
15.89 mag and a range from 15.87 to 15.92 mag. The 3-sigma UL at the XRT
position is 32.356 cps or 15.83 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.48 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 319.8095 dec= 34.5551 mag=16.53 sep=5.04".
The closest srclist source has ra= 319.8095 dec= 34.5551 mag=16.53 sep=5.04".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 319.8095 dec= 34.5552 mag=15.79 sep=5.14". The closest Genie
source has ra= 319.8095 dec= 34.5552 mag=15.79 sep=5.14".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 875 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 21:19:14.29 = 319.80953
DEC(J2000) = +34:33:18.7 = 34.55519
with a 90%-confidence error radius of about 0.61 arc sec. This position is 5.14
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.79 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.155.
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
636664687 875 WHITE srclist found no candidates.
636664687 875 WHITE image found no candidates.
List afterglow candidates for other finding charts.
636663896 84 WHITE srclist found no candidates.
636663896 84 WHITE image found no candidates.
636664108 296 ? srclist data are not available.
636664108 296 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 34.55403
GRB_ERROR: 5
GRB_RA: 319.81054
IMAGE_START_TIME: 19:18:02
MAGNITUDE: 15.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT